Islam Shahwan, a Hamas Interior Ministry spokesman, said the campaign promised amnesty for collaborators who surrender willingly.
In its second part, the campaign involves public programs to raise awareness against aiding Israel with information, he said.
In 2007, Hamas took over Gaza after routing security forces loyal to President Mahmoud Abbas of the rival Fatah movement. Since then, Hamas prides itself on "cleaning" the coastal enclave from Israel's eyes.
But in subsequent waves of cross-border fighting with Israel, Israeli airplanes identified and hit several Hamas targets, including senior military and political leaders who used to move in disguise and secretly, such as Interior Minister Said Siam and Hamas' military chief Ahmed al-Jaabari.
Hamas blames the collaborators for helping Israel allocating its bank of targets. During the eight-day clash between Hamas and Israel in November 2012, which was sparked after the killing of al- Jaabari, Hamas executed seven collaborators in the streets, some of them summarily, in addition to 14 others who were executed after complete trials over the past three years.
The new campaign against spying is the second of its kind that Hamas launches. Shahwan said that in 2010, about 30 collaborators handed themselves over to his ministry.
- 30/08/2015 Iran nuclear deal will 'fuel terrorism': Netanyahu
- 30/08/2015 Huge Malaysia rally for Najib's resignation enters 2nd day
- 30/08/2015 24 killed in bomb attacks, clashes with IS in Iraq's Anbar
- 29/08/2015 Iran's Rouhani says military power not affected by nuclear deal: state TV
- 29/08/2015 7 killed, 2 injured in China paper mill accident
- 29/08/2015 Philippines: 3 Abu Sayyaf killed, 15 injured in fighting
- 29/08/2015 Saudi-led air strikes kill 10 people in central Yemen: officials
- 28/08/2015 Eleven killed in India-Pakistan border shelling
- 28/08/2015 Japan Launches Newest Izumo-Class Helicopter Carrier
- 28/08/2015 Greece top judge takes over as interim prime minister
- 28/08/2015 MERS virus kills 19 in seven days in Saudi: Ministry
- 27/08/2015 IAEA to establish first nuclear fuel bank in Kazakhstan
- 27/08/2015 One civilian dead, several injured in east of Turkey
- 27/08/2015 Pakistani court orders arrest of ex-PM Gilani over graft charges
- 27/08/2015 ISIL seizes five Syrian border villages
- 27/08/2015 Panasonic to cut 1,300 jobs
- 27/08/2015 Iran urges US to release 19 detainees
- 27/08/2015 U.S. reports 20 air strikes against Islamic State in Iraq and Syria
- 26/08/2015 5 killed in clashes in western Indian state
- 26/08/2015 22 IS militants killed in airstrikes in Anbar province
- 26/08/2015 Magnitude 5.2 Earthquake Rocks Southeast Japan
- 26/08/2015 US, Turkey finalize ‘details’ of Mideast air campaign
- 26/08/2015 Taliban torch civilian homes in central Afghanistan
- 26/08/2015 Road accident kills 3, injures 7 in NW China
- 26/08/2015 Magnitude 4.6 quake strikes two cities in northern Tehran Province
- 25/08/2015 International Atomic Energy Agency approves plan of Iran’s nuclear inspections
- 25/08/2015 Saudi Arabia reports 7 more deaths from MERS
- 25/08/2015 Two killed in clashes in south Lebanon refugee camp
- 25/08/2015 Islamic State claims to kill 30 for sodomy
- 25/08/2015 Six militants, army colonel killed in Pakistan clash
- 24/08/2015 North Korea announces agreement with South
- 24/08/2015 Britain says Iran too powerful to leave in isolation
- 23/08/2015 Iran, Britain FMs to meet in Tehran
- 23/08/2015 North, South Korea officials to resume talks later Sunday - South's presidential office
- 23/08/2015 Police moves to break up protests over garbage crisis in Lebanese capital
- 23/08/2015 Palestinian President Abbas resigns from PLO leader ship
- 23/08/2015 Violence in Central African Republic town kills 10
- 22/08/2015 Pakistani court disqualifies parliament speaker over alleged polls fraud
- 22/08/2015 Barrel bombs fall on Syria’s Douma, killing 50: Source
- 22/08/2015 Attack on NATO convoy in Kabul kills 3